bumps on the head?

got kicked nice and hard behind my ear a couple nights ago during vale tudo sparring. wasn't targeted there, rather side of my head, but i got hit there nonetheless the impact hurt, but the area didn't really bother me at all afterwards, i actually just kept going as if nothing.

noticed a nice big bump the next day. hurts a bit if i pressure it.

my instructor said an anti-inflammatory, like diclofenac 50mg, and ice should do the trick.

anyone have any other tips they might like to share? i don't wanna have a bumpy head 'n stuff.